CN209912942U

CN209912942U - Power battery package and vehicle

Info

Publication number: CN209912942U
Application number: CN201921181608.3U
Authority: CN
Inventors: 叶鹏; 冯冰; 宋海阳; 于世梦
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-01-07
Anticipated expiration: 2029-07-25

Abstract

The utility model relates to a new energy automobile power battery field, specifically a power battery package and vehicle, including upper cover, lower casing, the upper cover is located the upper opening part of lower casing, the upper cover with the lower casing encloses into the accommodating space that is used for accommodating the soft-packaged electricity core; the upper cover is provided with a shielding piece towards the inner side of the containing space; the shielding piece is close to the joint of the upper cover and the lower shell so as to shield the laser emitted from the joint of the upper cover and the lower shell. The laser welding protection device has the advantages that the soft package battery cell can be protected from laser irradiation when the upper cover and the lower shell are subjected to laser welding.

Description

Power battery package and vehicle

Technical Field

The utility model relates to a new energy automobile power battery field, concretely relates to power battery package and vehicle.

Background

With the current social energy crisis becoming more serious, new energy automobiles are getting more and more social attention, especially electric automobiles. The soft package battery core is the core part of power battery package. The soft-package battery cell battery pack gradually shows advantages in the market due to the advantages of light weight, large specific energy, good explosion resistance, strong cruising ability and the like. The external package of the soft-package battery cell is generally an aluminum-plastic film, which is relatively fragile and easy to damage. After the soft-packaged cells are assembled into groups, the soft-packaged cells are easy to cause short circuit or other irreversible damages due to stress concentration when vehicles move violently and vibrate; so generally install soft-packaged electrical core in the casing of stereoplasm, make soft-packaged electrical core be in under the operational environment of a "comfortable", be favorable to promoting soft-packaged electrical core's circulation life, reduce soft-packaged electrical core and produce the risk of abuse, promote soft-packaged electrical core's security.

In the prior art, as shown in fig. 6, a power battery pack includes an upper cover, a lower casing, and a soft package battery cell installed in the lower casing. and a indicates laser irradiation. During the equipment, install soft-packaged electrical core at the inferior valve internally, the upper cover receives the pressure of frock and inferior valve body butt joint, later with the upper cover with lower casing welding together through laser. Due to the existence of assembly errors and machining errors, gaps exist between the upper cover and the lower shell at the butt welding position.

So, when using laser welding, the part that energy was concentrated in the middle of the laser can pass the clearance, gets into the inferior valve internal, shines the soft packet of electricity core surface. Because the temperature of laser is very high, shine soft-packaged electrical core surface back, soft-packaged electrical core surface plastic-aluminum membrane is burnt easily, causes soft-packaged electrical core electric leakage phenomenon.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a power battery package and vehicle can protect soft-packaged electrical core not receive shining of laser, has solved the influence to electric core when upper cover and lower casing laser welding.

In order to achieve the above purpose, the utility model provides a following technical scheme:

the utility model provides a power battery pack, which comprises a soft-package battery cell, an upper cover and a lower shell, wherein the upper cover is arranged at the upper opening of the lower shell, and the upper cover and the lower shell enclose an accommodating space for accommodating the soft-package battery cell; the upper cover is provided with a shielding piece towards the inner side of the containing space; the shielding piece is close to the joint of the upper cover and the lower shell so as to shield the laser emitted from the joint of the upper cover and the lower shell.

In one possible implementation manner, the upper end surface of the lower shell is welded with the lower surface of the upper cover; the lower end face of the shielding piece is positioned below the upper end face of the lower shell.

In one possible implementation manner, the shielding piece comprises a protruding part arranged on the inner side wall of the upper cover.

In one possible implementation manner, the shielding piece comprises a concave part formed by sinking a part of the upper cover towards the accommodating space.

In one possible implementation manner, an insulating layer is arranged between the shielding piece and the soft package battery core, and the lower end face of the shielding piece is matched with the surface of the insulating layer.

In one possible implementation manner, the upper cover is provided with a limiting groove, the lower shell is provided with a limiting protrusion matched with the limiting groove, and the limiting protrusion is arranged on the upper end face of the lower shell and extends upwards.

In one possible implementation manner, the shielding piece comprises a plurality of shielding pieces which are distributed at intervals, and the shielding pieces and the limiting grooves are arranged in a staggered manner.

In one possible implementation manner, the shielding pieces are arranged at the edges of the upper cover along the width direction of the soft package battery core; the edge of the upper cover along the length direction of the soft package battery cell is provided with a fastening hole so as to be fastened and connected with the lower shell through a fastening piece.

The utility model also provides a vehicle, a vehicle body and a power battery pack arranged on the vehicle body; wherein, power battery package is as any one preceding power battery package.

The embodiment of the utility model provides a power battery package through setting up the shielding piece at the upper cover towards the inboard in accommodation space, shielding piece is close to upper cover and lower casing joint department. So, see through the clearance between upper cover and the lower casing when laser, get into accommodating space after, laser is earlier intercepted by the shielding piece, and then prevents laser and soft package electricity core surface contact. The aluminum plastic film on the surface of the soft-package battery cell is protected, and the advantage of prolonging the service life of the soft-package battery cell is achieved.

In addition to the technical problems addressed by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be described in detail in one of the possible implementations in the detailed description of the embodiments.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic perspective view of a power battery pack provided according to an exemplary embodiment, wherein a covering member is a recessed portion;

FIG. 2 is an enlarged view at A of FIG. 1 of a power battery pack provided in accordance with an exemplary embodiment;

FIG. 3 is a partial cross-sectional view of a power cell pack provided in accordance with an exemplary embodiment to illustrate a raised portion that is a baffle;

FIG. 4 is a partial cross-sectional view of a power battery pack provided in accordance with an exemplary embodiment to illustrate a recess having an L-shaped cross-section;

FIG. 5 is a partial cross-sectional view of a power battery pack provided in accordance with an exemplary embodiment to illustrate a recess;

fig. 6 is a schematic diagram in the prior art.

Description of reference numerals:

1. an upper cover; 11. a limiting groove; 2. a lower housing; 21. a limiting bulge; 3. soft-packaged battery cells; 4. a shield; 41. a boss portion; 42. a recessed portion; 5. an insulating layer; 51. an upper portion; 52. a lower portion; 6. a buffer layer.

With the above figures, certain embodiments of the present invention have been shown and described in more detail below. The drawings and the description are not intended to limit the scope of the inventive concept in any way, but rather to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention.

Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1 and 2, a power battery pack includes an upper cover 1 and a lower casing 2, the upper cover 1 is disposed at an upper opening of the lower casing 2, and the upper cover 1 and the lower casing 2 enclose an accommodating space for accommodating a soft-package battery cell 3; the upper cover 1 is provided with a shielding piece 4 facing the inner side of the containing space; the shielding member 4 is close to the joint of the upper cover 1 and the lower housing 2 to shield the laser light emitted from the joint of the upper cover 1 and the lower housing 2.

Soft-packaged electrical core 3 is equipped with a plurality ofly, and in accommodating space was arranged in to a plurality of soft-packaged electrical core 3, a plurality of soft-packaged electrical core 3 were protected by upper cover 1 and lower casing 2, were difficult for being collided or extrudeed. The shield 4 is of a highly reflective material. The laser light is not projected after being irradiated to the shutter 4. After laser enters the accommodating space from the joint of the upper cover 1 and the lower shell 2, the shielding piece 4 is close to the joint of the upper cover 1 and the lower shell 2, so that the shielding piece 4 is intercepted by the laser, and the surface contact of the laser and the soft package battery cell 3 is prevented. And when the laser light strikes the shield 4, the energy carried by the laser light is attenuated by the impact or absorption by the shield 4. The aluminum plastic film on the surface of the soft-package battery cell 3 is protected, and the service life of the soft-package battery cell 3 is prolonged.

Specifically, when assembling, the soft-package battery cell 3 is installed in the lower case 2; the upper cover 1 is subjected to vertical downward force given by the tool, so that the upper cover 1 and the lower shell 2 are butted and buckled; but there is still a gap invisible to the naked eye at the fastening position of the upper cover 1 and the lower case 2. Therefore, laser can enter the accommodating space through the gap and irradiate the soft package battery core 3;

alternatively, the upper cover 1 and the lower housing 2 are made of aluminum, which has good plasticity and can be manufactured into products with different shapes by an extrusion process. The process is mature, the price is convenient and official, and the processability is high; the aluminum material has good heat dissipation performance, can absorb the expansion force in the charge and discharge process of the battery cell and plays an important role in protecting the battery cell; the aluminum material is a high-reflection material, can reflect visible light and ultraviolet rays, and can intercept laser.

Alternatively, the upper cap 1 is shaped like a plate and the lower shell 2 is U-shaped in cross-section. When the connection is carried out, the two ends of the upper cover 1 in the length direction are correspondingly buckled with the two ends of the lower shell 2 in the length direction. The upper cover 1 and the lower shell 2 are connected in the length direction through welding, and the upper cover 1 and the lower shell 2 are connected in the width direction through fasteners. Thus, the shielding member 4 only needs to be provided at both ends of the upper cover 1 in the longitudinal direction. Optionally, a plurality of lightening holes are formed in the side wall of the lower shell 2 to lighten the overall weight of the power battery pack and also play a role in accelerating heat dissipation.

In one possible embodiment, the shield 4 is located closer to the inner wall of the lower housing 2 than the soft-pack cell 3.

The heights of the points of the flexible package core 3 in the accommodating space in the longitudinal direction are different from each other, and are not located at the same height as shown in the figure (the figure only shows an ideal state). The shield 4 is located closer to the inner wall of the housing than the soft-packed cell 3. Therefore, when the laser enters the accommodating space, the laser is intercepted by the shielding piece 4. The laser hardly irradiates on the soft-package battery core 3.

In one possible implementation, the upper end surface of the lower shell 2 is welded to the lower surface of the upper cover 1; the lower end face of the shield 4 is located below the upper end face of the lower housing 2.

During welding, laser enters the accommodating space from a gap between the lower surface of the upper cover 1 and the upper end surface of the lower shell 2. Since most of the laser light travels perpendicularly to the side wall of the lower case 2 (i.e., in the horizontal direction). Therefore, as long as the lower end surface of the shield 4 is lower than the upper end surface of the lower case 2 (i.e., the welding point of the upper cap 1 and the lower case 2 is located within the projection of the shield 4), the laser light can be shielded.

Specifically, the longitudinal height difference between the lower end face of the shielding member 4 and the upper end face of the lower housing 2 should not be too long, which may increase the longitudinal height of the power battery pack. The difference in longitudinal height between the lower end face of the shield 4 and the upper end face of the lower housing 2 is preferably such as to block part of the laser light which is obliquely incident into the receiving space.

In one possible implementation, as shown in fig. 3 and 4, the shutter 4 includes a protrusion 41 provided on the inner side wall of the upper cover 1.

The boss 41 is provided on the lower surface of the upper cover 1. The additional protrusion 41 can not only block the laser and reduce the intensity of the laser, but also the protrusion 41 can be used as a rib to enhance the structural strength of the upper cover 1. When the upper cover 1 is pressed by the tool and butted with the lower shell 2, the protruding part 41 can prevent the upper cover 1 from being extruded and deformed to influence the laser welding effect.

Specifically, the protruding portion 41 is closer to the inner wall of the lower case 2 than the battery cell, and the lower end face of the protruding portion 41 is lower than the upper end face of the lower case 2. Alternatively, the boss 41 and the upper cover 1 may be fixed together by welding, bolting, or the like.

As shown in fig. 3, optionally, the protruding portion 41 is a block, and after the laser enters the accommodating space, the energy carried by the laser is weakened when the laser meets the protruding portion 41.

As shown in fig. 4, the protrusion 41 may alternatively include a vertical plate connected to the upper cover 1 and a horizontal plate abutting against an inner wall of the lower case 2. The laser emitted into the accommodating space enters the space surrounded by the transverse plate, the vertical plate, the inner wall of the lower shell 2 and the upper cover 1, and the energy is consumed. Compare in bellying 41 and be only a baffle, its laser scope that blocks is wider, has protected soft-packaged electrical core 3 better.

As shown in fig. 5, in one possible implementation, shutter 4 includes a recess 42 formed by a portion of upper cover 1 recessed toward the housing space.

The upper cover 1 is made of an aluminum material, so that the recess 42 is obtained by pressing. The aluminum material is a high-reflection material, can reflect visible light and ultraviolet rays, and can intercept laser. It is easier to machine the recess than the convex portion 41 for actual machining. Meanwhile, the depression 42 formed by punching does not increase the weight of the upper cover 1 relative to the addition of the projection 41.

Specifically, regardless of the shape of the punching head for punching the upper lid 1, the lower end face of the recess 42 and the upper surface of the soft packing cell 3 are ensured to be in surface-to-surface contact. The contact area between the depressed portion 42 and the upper surface of the soft-packed cell 3 cannot be excessively small. When guaranteeing that the upper cover 1 receives the pressure given by the tool and the lower shell 2 is butted, the stress load of the soft-package battery cell 3 is uniformly distributed on the soft-package battery cell 3, and the phenomenon of stress concentration can not occur.

Optionally, the shape of the abrupt change of the concave portion 42 is rounded, so that stress concentration is not likely to occur at the shape of the abrupt change of the concave portion 42 after the concave portion 42 is stressed.

As shown in fig. 2, in one possible implementation, an insulating layer 5 is disposed between the shielding member 4 and the soft packing core 3, and a lower end surface of the shielding member 4 is adapted to a surface of the insulating layer 5.

The insulating layer 5 not only serves an insulating function. And be located between soft-packaged electrical core 3 and shielding piece 4, avoid shielding piece 4 and soft-packaged electrical core 3's direct contact, born shielding piece 4 to soft-packaged electrical core 3's pressure.

As shown in fig. 3-5, the material of the insulating layer 5 is PC, which is a dielectric material. When mounting, the insulating layer 5 is bonded to the upper cover 1 or the shield 4. And then the upper cover 1 is butted with the lower shell 2.

As shown in fig. 3 to 5, the insulating layer 5 optionally comprises an upper portion 51 connected to the shield 4, and a lower portion 52 connected to the inner wall of the lower case 2. The upper portion 51 is provided with an inverted U-shaped cross section, and the lower portion 52 is provided with a U-shaped cross section. When the upper cover 1 and the lower housing 2 are mated, the upper portion 51 is inverted with respect to the lower portion 52. Thus, the upper part 51 and the lower part 52 have a laminated part, and the upper part 51 and the lower part 52 do not have a gap, thereby having a better insulation effect.

As shown in fig. 3, 4 and 5, optionally, a buffer layer 6 is provided between the insulating layer 5 and the upper cover 1 or the shield 4. The buffer layer 6 is made of sponge. After the tool presses the upper cover 1, the upper cover 1 is butted with the lower shell 2. The upper cover 1 or the shielding piece 4 has pressure on the soft-package battery core 3, and the buffer layer 6 is additionally arranged. The impact of the pressure of the part on the soft-package battery core 3 can be relieved and eliminated. Since laminate polymer core 3 dispels the heat through casing 2 down, so increase buffer layer 6 at upper cover 1, do not have the influence to the holistic thermal diffusivity of power battery package.

Alternatively, the insulating layer 5 is an insulating paint applied to a surface of the upper cover 1 facing the accommodating space (i.e., a lower surface of the upper cover 1) or the shutter 4 (the application of the insulating paint is not shown). The insulating paint can resist temperature below deg.c, and is made up by using inorganic-organic polymer as base material and inorganic crystal material with high volume resistivity and compact structure, such as alumina, silicon nitride, etc. as filler and ceramic particles as high-temperature film-forming material as main material. The insulating paint is also required to be applied to the inner wall of the lower case 2. Thus, compared with the insulating layer 5 made of PC material, the step of gluing is reduced, and the longitudinal height of the power battery pack is reduced.

As shown in fig. 2, in one possible implementation manner, the upper cover 1 is provided with a limiting groove 11, the lower shell 2 is provided with a limiting protrusion 21 matched with the limiting groove 11, and the limiting protrusion 21 is arranged on the upper end surface of the lower shell 2 and extends upwards.

When assembling upper cover 1 and lower casing 2, correspond the position of spacing recess 11 and spacing arch 21, again with spacing recess 11 and spacing arch 21 cooperation, so, upper cover 1 and lower casing 2's position can be confirmed. The operator can find the position conveniently. The limiting protrusions 12 are arranged at two ends of the lower shell 2 in the length direction, and the limiting grooves 11 are arranged at two ends of the upper cover 1 in the length direction.

Optionally, the inner wall of the limiting groove 11 or the outer wall of the limiting protrusion 21 is connected with a sealing ring, and when the limiting protrusion 21 is matched with the limiting groove 11, the limiting protrusion 21 and the limiting groove 11 are tightly matched due to the sealing ring, so that a gap between the limiting protrusion 21 and the limiting groove 11 is eliminated.

In one possible implementation manner, the shielding piece 4 comprises a plurality of shielding pieces 4, the shielding pieces 4 are distributed at intervals, and the shielding pieces 4 and the limiting groove 11 are arranged in a staggered manner.

In the actual welding process, welding is required to be performed along the lower surface of the upper cover 1 and the upper end surface of the lower shell 2, and after encountering the limiting protrusion 21, the welding is required to be performed along the original path after skipping the limiting protrusion. No gap exists at the position of the limiting bulge 21, welding is not needed, and the position of the limiting bulge 21 does not need the shielding piece 4 to shield laser. Therefore, the shutter 4 is offset from the limit recess 11.

With reference to fig. 1 and 2, in one possible implementation manner, the upper cover 1 is provided with a shielding piece 4 at the edge along the width direction of the power battery pack; the upper cover 1 is provided with fastening holes along the edges of the power battery pack in the length direction to be fastened to the lower case 2 by fastening members. The upper cover 1 and the lower shell 2 are fixedly connected in the width direction of the soft-package battery cell 3 (namely, at two ends of the upper cover 1 in the length direction) in a welding manner; the upper cover 1 and the lower casing 2 are fastened and connected through a fastener in the length direction of the soft-package battery core 3 (namely, at the two ends of the upper cover in the width direction).

Alternatively, the lower case 2 includes a fixed portion coupled to the upper case 1, and a movable portion detachably coupled to the upper case 1. The movable part and the fixed part are detachably connected. When examining and repairing the soft-packaged electrical core 3 in the casing 2 down, only need with the movable part from upper cover 1 and fixed part dismantlement get off, take out soft-packaged electrical core 3 can.

Alternatively, the movable portion is a movable plate located at one end of the upper cover 1 in the width direction. The movable plate is connected with the fixed part and the upper cover 1 through fasteners.

Optionally, the fastener is a bolt.

The embodiment also provides a vehicle, which comprises a vehicle body and the power battery pack installed on the vehicle body.

The structure, function and implementation process of the power battery pack may be the same as or similar to those of the previous embodiments, and are not described herein again.

Specifically, the vehicle body comprises a vehicle frame, an electric drive system and an auxiliary system. The working principle of the electric vehicle is as follows: the power battery pack, the current, the power regulator, the motor, the mechanical transmission device and the vehicle drive vehicle to run.

The electric drive system includes a controller, a power converter, an electric motor, a mechanical transmission, wheels, and the like. The controller is similar to the nerve center of a human body, and the electric automobile must perform coordination control of each subsystem through a whole automobile control system, so that the optimal performance of the whole automobile is realized; a power converter is an electronic device that can convert a certain current into another type of current. The method comprises the following steps of (1) converting direct current power and alternating current power; the electric motor is like an engine in a traditional automobile, and the main task of the electric motor is to efficiently convert electric energy stored by a power battery into kinetic energy of wheels to drive the automobile under the control of a driver, or convert the kinetic energy of the wheels into electric energy to be fed back to the power battery during braking so as to realize the recovery of braking energy of the automobile; the mechanical transmission device transmits the driving torque of the motor to a driving shaft of the automobile, and the driving shaft becomes acting force on the ground through wheels to drive the wheels to walk.

The auxiliary system comprises an auxiliary power source, a power steering system, an air conditioner, a lighting device and the like.

The power battery pack of the vehicle is formed by connecting a plurality of power battery packs in series and in parallel. With the power battery pack, the power battery packs of the whole vehicle can be arranged and combined relatively freely. Each power battery pack is provided with an independent heat management system and an independent battery management system, so that the power battery pack is provided with more efficient heat dissipation performance and structural strength, meanwhile, intelligent management of the battery core is effectively achieved, and the battery state of each power battery pack in the whole life cycle is monitored in real time.

The working principle is as follows: during the equipment, arrange soft-packaged electrical core 3 in casing 2 down, adjust 1 position of upper cover for 1 spacing recess 11 that open of upper cover has corresponds with spacing arch 21 on the casing 2 down. The tooling applies pressure to the upper cover 1 so that the upper cover 1 moves downward until it abuts against the lower housing 2. The upper cover 1 and the lower shell 2 are connected in a mode that two ends of the upper cover 1 in the length direction are welded by laser; the two ends of the upper cover 1 in the width direction are connected by fasteners.

In the welding, the lower end surface of the upper cover 1 and the upper end surface of the lower case 2 are welded. The lower surface of the upper cover 1 is provided with a shielding piece 4. The shielding piece 4 is closer to the inner wall of the lower shell 2 than the soft package battery core 3, and the lowermost end face of the shielding piece 4 is lower than the upper end face of the lower shell 2 (i.e. the line where the upper cover 1 and the lower shell 2 are welded). So, see through the clearance between upper cover 1 and the lower casing 2 as laser, get into accommodating space after, laser is earlier intercepted by shielding piece 4, and then prevents laser and 3 surface contact of soft-packaged electrical core. The aluminum plastic film on the surface of the soft-package battery cell 3 is protected, and the advantage of prolonging the service life of the soft-package battery cell 3 is achieved.

The terms "upper" and "lower" are used to describe relative positions of the structures in the drawings, and are not used to limit the scope of the present invention, and the relative relationship between the structures may be changed or adjusted without substantial technical changes.

It should be noted that: in the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Furthermore, in the present disclosure, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A power battery pack comprises a soft-package battery cell, an upper cover and a lower shell, wherein the upper cover is arranged at an upper opening of the lower shell, and an accommodating space for accommodating the soft-package battery cell is enclosed by the upper cover and the lower shell; the storage box is characterized in that a shielding piece is arranged on the inner side of the upper cover facing the storage space; the shielding piece is close to the joint of the upper cover and the lower shell so as to shield the laser emitted from the joint of the upper cover and the lower shell.

2. The power battery pack of claim 1, wherein the shield is closer to the inner wall of the lower housing than the pouch cell.

3. The power battery pack of claim 1, wherein the upper end surface of the lower housing is welded to the lower surface of the upper cover; the lower end face of the shielding piece is positioned below the upper end face of the lower shell.

4. The power battery pack of claim 1, wherein the shield includes a raised portion disposed on an inner sidewall of the upper cover.

5. The power battery pack according to claim 1, wherein the shielding member includes a recessed portion formed by a portion of the upper cover recessed toward the receiving space.

6. The power battery pack of claim 1, wherein an insulating layer is arranged between the shielding piece and the soft packaging core, and the lower end face of the shielding piece is matched with the surface of the insulating layer.

7. The power battery pack according to claim 1, wherein the upper cover is provided with a limiting groove, and the lower case is provided with a limiting protrusion engaged with the limiting groove, the limiting protrusion being provided on an upper end surface of the lower case and extending upward.

8. The power battery pack as recited in claim 7, wherein the shielding member comprises a plurality of shielding members, the plurality of shielding members are distributed at intervals, and the shielding members and the limiting grooves are staggered.

9. The power battery pack according to claim 1, wherein the shielding piece is arranged at the edge of the upper cover along the width direction of the soft package battery core; the edge of the upper cover along the length direction of the soft package battery cell is provided with a fastening hole so as to be fastened and connected with the lower shell through a fastening piece.

10. A vehicle, characterized by comprising: the power battery pack comprises a vehicle body and a power battery pack mounted on the vehicle body; wherein the power battery pack is as claimed in any one of claims 1-9.